Thursday

March 26, 2015

March 26, 2015

Posted by **Rachel** on Monday, August 21, 2006 at 8:14pm.

In the right triangle ABC, mangleB = 90, AB = 5, and AC= 12. Find BC. Round to the nearest tenth, if necessary.

Help?

Is AB a side and AC a side? I can't tell from your description which are sides and which is the hypotenuse.

But if you have two sides,

side1^2 + side2^2 = hypotenuse^2.

Post your work if you get stuck.

Okay, I have

AB^2 + BC^2 = AC^2

5^2+BC^2=12^2

23+BC^2=144

BC^2=119

BC=10.9

Is that correct?

If BC is the hypotenuse, AC is side 5 and you are looking for side BC, yes.

OR, you could have used trig to find the angle BAC from cos angle BAC = 5/12, then sin angle BAC = side BC/12.

using a protactor to measuer the angle. tell wheter the angle is acute obtuce right or srait

what is a acute angle a obtuse angle and a reflex angle ?

- abc' -
**abc'**, Wednesday, January 1, 2014 at 1:45amabc'

**Answer this Question**

**Related Questions**

geometry - In triangle ABC, angle C is a right angle. Find the remaining sides ...

geometry - In triangle ABC, angle B is a right angle. Find the remaining sides ...

geometry - Triangle ABC is a right triangle such that m angle B= 90 degrees. If ...

ALGEBRA 2 - In triangle ABC , angle C is a right angle. Find the remaining sides...

Precalc - Okay for this question I know I am supposed to use the law of sines. ...

Geometry - Quadrilateral WXZY is a square. If YX = 30 and WT = 2x – 7, then find...

Math - Determine the number of triangles that could be drawn with the given ...

math - I have 14 questions and I was wondering if someone could check my answers...

geometry - Quadrilateral JKLM is a rhombus. The diagonals intersect at N. If ...

geometry - Given: QRST is a parallelogram. Prove: QRST is a square. Complete ...