Question

1. look at the figure. find the value of x

90
100
80
45

Explanation:

Step1: Recall angle - sum property of a triangle

The sum of interior angles of a triangle is 180°.
Let the three angles of the triangle be \(x\), 45°, and 45°. So, \(x + 45+45=180\).

Step2: Solve for \(x\)

First, simplify the left - hand side: \(x + 90 = 180\).
Then, subtract 90 from both sides: \(x=180 - 90\).
So, \(x = 90\).

Answer:

90