Question

15. Determine the measure of x:
35
X
45

Answer 1

x = 45

Explanation:

What we know:

• This triangle is an isosceles triangle, so two of the angles are equal to x.
• The two bottom are equal to x.
• The top angle is ninety degrees
• All triangles are 180 degrees

Our equation: 180 = 90 + 2x

1. subtract 90 from both sides: 90 = 2x
2. divide both sides by 2: 45 = x
3. x is 45 degrees