Thread: Find Length AB

In ΔABC, mÐA = 40, mÐB = 70, and AC = 5 centimeters. Find the
length of AB in centimeters.

Originally Posted by magentarita

In ΔABC, mÐA = 40, mÐB = 70, and AC = 5 centimeters. Find the
length of AB in centimeters.

Since , it follows that since the sum of the measures of the angles of a triangle is 180 degrees.

If two angles of a triangle are congruent, then the triangle is isosceles.
If the triangle is isosceles then the sides opposite the congruent angles are congruent.



cm.