The angles in a triangle are 26 and 77 degrees. Classify the triangle by its angles and sides. A. Right isosceles
B. Right Scalene
C. Obtuse scalene
D. Acute isosceles
E. Acute scalene
F. Obtuse isosceles

Acute isosceles

A triangle is 180 degrees
180-26-77=77
Two angles are 77 meaning it will be an isosceles
no angles are above or equal to 90 making them all acute

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)