Question

1. what is ( mangle qtr )? a. 35 b. 130 c. 80 d. 45

Explanation:

Step1: Read the inner scale for \(\angle QTR\)

The inner scale of the protractor is used. The ray \(QR\) aligns with \(80^{\circ}\) and the ray \(QT\) aligns with \(45^{\circ}\) on the inner scale.

Step2: Calculate the measure of \(\angle QTR\)

We use the formula \(m\angle QTR=\vert\text{reading of }QR - \text{reading of }QT\vert\). So \(m\angle QTR = 80 - 45\)

Answer:

\(35\), so the answer is A. 35