Question

Consider triangle ABC. Triangle A B C. Angle C is 80 degrees and angles B and A are y degrees. What is the value of y in the triangle? Angle y = °

Answer 1

y is equal to 50 degrees.

Explanation:

The sum of the angles of a triangle is always 180 degrees. To find what y is, subtract 80 from 180 and divide the difference by 2. This will give you 50 degrees.

Answer 2

y= 50°

Explanation:

∠A =∠B = y. So, ΔABC is an isosceles triangle.

Sum of angles of triangle = 180

∠A + ∠B + ∠C = 180

y + y + 80 = 180 {add like terms}

2y + 80 = 180 {Subtract 80 from both sides}

2y + 80 - 80 = 180 - 80

2y = 100 {divide both sides by 2}

2y/2 = 100/2

y= 50°