Find the degree measure of either of the exterior angles formed by extending the base of an isoscele triangle if the vertex angle of the triangle measures:
b. 82 degree
c. 40 degree
thank you!
2007-08-08 12:10:34 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Simple An isosceles means that two angles are the same. So if the vertex is 82* (each triangle is 180*) that means that 98* are left over so each base angle is 49*. A straight line is 180. So you have to find the supplement of 49*. The supplement of 49* is 131*
B. 131*
C. 110*
2007-08-08 12:15:50 · answer #1 · answered by dudas_91 4 · 0⤊ 0⤋
Draw it out and it should be clear to you.
Isosceles triangle is a triangle that has two equal angles. If the vertex is 82 degrees, the remaining angles are 180 - 82 = 98 degrees. If this is the case, each of the angle is 49 degrees. If this is the case, outside angle is 180 - 49 = 131 degrees.
It's far easier than what it seems. Draw it out and see for yourself. Good luck.
2007-08-08 19:14:45 · answer #2 · answered by tkquestion 7 · 0⤊ 0⤋
no geometry sucks
2007-08-08 19:17:36 · answer #3 · answered by bigbeef3383 2 · 0⤊ 1⤋