Homework Help: geometry

Posted by lacey on Thursday, January 12, 2012 at 10:13pm.

1. A triangle has side lengths of 8, 10, and 12. what kind of triangle is it?
2. A triangle has side lengths of 3, 4, and 7. what kind of triangke is it?

geometry - Steve, Friday, January 13, 2012 at 10:55am
take the two smaller sides, call them a and b. call the longest side c.

if a^2 + b2 = c^2 you have a right triangle

if < c^2 it's acute
if > c^2 it's obtuse

in addition, if you can find a,b,c such that

a=b=c it's equilateral
a=b≠c it's isosceles
a≠b≠c it's scalene

plug in your numbers and make your choice.

Answer this Question

Related Questions

Math - If all of the following triangles have the same perimeter, which has the ...
geometry - A triangle has side lengths of 3in, 4in, and 6in. The longest side of...
Geometry - The lengths of the sides of a triangle are 3,5, and 7 inches. How ...
Geometry - The sides of a triangle measure 9 , 15 , and 18 . If the shortest ...
5th grade - the lengths of two sides of a triangle are 15 inches each and the ...
geometry - the sides of a triangle have lengths 4x+1, 2x+1 and 6x-1. if the ...
Geometry - find the lengths of the sides of a triangle whose perimeter is 37. ...
Geometry - SORRY I FORGOT SOME QUESTI IN MY LAST POST!!! The lengths of two ...
geometry - An angle bisector of a triangle divides the opposite side of the ...
math - triangle a and b are similar the ratio of a side of triangle b to a ...

For Further Reading

First Name:
School Subject:
Answer: