# basic geometric

a would like to get someone too help me with these math problem.
Two angles of a triangle are 40 degrees and 62 degrees; what is the third angle's measur?

The angles of a triangle always adds to 180o. You know two of the angles, solve for the third.

can you please explained to me clearly beucase I don't understand it
thank you

Angle 1 + angle 2 + angle 3 = 180
Angle 1 = given
angle 2 = given
There is only one unknown in the equation. Solve for angle 3.

If you still don't understand, please explain in detail what you are having trouble understanding.

I do not know how to get the answer for the third angle, if two angles are 40 degrees and third is 62 degrees ; how do I do I do it do I multiplyor how do I get the answer yousee i been out of school for so long that I don't know how to do these math problems, i I have others problems that i haven't donne because I don't understand but thak you for helping me . but please explain these work

angle 1 + angle 2 + angle 3 = 180
angle 1 = 40 from the problem.
angle 2 = 62 from the problem.
angle 3 is not known.

40 + 62 + angle 3 = 180
add 40 + 62 = 102.
102 + angle 3 = 180
angle 3 = 180 - 102 = 78 degrees.

The width of a rectangle is 3 meters less than the length.The perimeter is 14 meters .Find the width.

The second angle of a triangle is twice the first angle. the third angle is 20 degrees mor than the first angle. Find the first angle.

One angle of a triangle is 20 degrees. The second angle's measuremant is four times the third . What is the measure of the third angle?

The sum of two angles in a triangle total 62.5 degrees. What is the other angle's measure?

W = L - 3M

2L + 2W = 14

2L + 2(L-3M) = 14
2L + 2L - 6 = 14
4L - 6 = 14
4L = 14 + 6
4L = 20
L = 20 / 4
L = 5

sub the value of L back into the perimeter fomula to find W.

2L + 2W = 14
2(5) + 2W = 14
10 + 2W = 14
2W = 14 - 10
2W = 4
W = 4 / 2
W = 2
_______________________________________

A + 20 = C

1/2B = A

A+B+C = 180
A+B+(A+20) = 180
2A + B + 20 = 180
2A + B = 180 - 20
2A + B = 160

since we know the value of A sub into formula

2A + B = 160
2(1/2B) + B = 160
B + B = 160
2B = 160
B = 160 / 2
B = 80

A+B+C = 180
A+ 80 + C = 180
A+C = 180 - 80
A + C = 100

from above sub. the value of C into the equation.

A + C = 100
A + (A + 20) = 100
2A + 20 = 100
2A = 100 - 20
2A = 80
A = 80 / 2
A = 40

We found the value of A and B sub. it back into the formula to find C.\

A + B + C = 180
40 + 80 + C = 180
120 + C = 180
C = 180 - 120
C = 60
_______________________________________

A = 20

B = 4C

A + B + C = 180
20 + B + C = 180
B + C = 180 - 20
B + C = 160

from above sub. the value of B into the equation.

B + C = 160
4C + C = 160
5C = 160
C =160 / 5
C= 32 degrees
_______________________________________

180 degrees-62.5 degrees= 117.5 degrees

general review for the high school student.

1. 👍 0
2. 👎 0
3. 👁 145

## Similar Questions

1. ### basic geometric

a would like to get someone too help me with these math problem. Two angles of a triangle are 40 degrees and 62 degrees; what is the third angle's measur? answered below. Interior angles of a triangle is equal to 180 degrees. A

asked by vero on March 11, 2007
2. ### mathematics

Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(angle1)=4x+10 and m(angle7)=6x+4, what are the measures of angles 1 and 7? Give a property of angles that helped you solve the problem.

asked by nicole on February 10, 2010
3. ### English

1. He can not solve the math problem. 2. He cannot solve the math problem. 3. He can't solve the math problem. 4. He could not solve the math problem. 5. He couldnot solve the math problem. 6. He couldn't solve the math problem.

asked by rfvv on July 16, 2013
4. ### Math

Math problem: If one of the triangle's is 130%. How do I figure out the rest of the angles?

asked by Peter on February 22, 2008
5. ### geometry

Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(Ú1)=4x+10 and m(Ú7)=6x+4, what are the measures of angles 1 and 7? Give a property of angles that helped you solve the problem.

asked by nicole on February 10, 2010
6. ### Math

Help plz I got a new Math problem that said this " Which letter has two obtuce angles? " ( My sis is " smartybrat" ) if you can answer it go by "Maddy .H."

asked by Stace on April 28, 2016
7. ### Calculus- Vectors

I've come across this math problem and need help on working it out. Ropes 3 m and 5 m in length are fastened to a holiday decoration that is suspended over a town square. The decoration has a mass of 5 kg. The ropes, fastened at

asked by Anonymous on April 4, 2013
8. ### geometry

which of the following statements are true? a. if two angles form a linear pair, then the angles are supplementary b. if two angles are right angles, then the angles are complementary c. if two angles have the same measure, then

asked by anon12 on September 2, 2018
9. ### math

I can't figure this out after many tries. The closest I got to was 367. Please help me!! Add the appropriate signs (+, -,x,/) to complete each math problem. Each sign is to be used one time for each math problem. Solve each

asked by Elizabeth on May 16, 2019
10. ### Per-calc Helppppp

keep in mind answers should be pi radians or if necessary 3 dec. csc^2-2=0 all angles 4cos^2x-4cosx+1=0 all angles and name 8 angles 7sin^2x-22sinx+3=0 all angles and name 8 angles 2cos^2x-7cosx=-3 all angles sinx(2sinx+1)=0 all

asked by Amanda on April 19, 2012
11. ### algebra.

problems about angles: Hi. I needed help on some problems for the math section that we are doing in class. I am trying out some problems in my math book, but they prove quite difficult. 1. In a certain parallelogram, if the

asked by jason on November 15, 2007

More Similar Questions