Question

1. squares a square has four right - angle corners. give an example of another shape that has four right - angle corners.
2. stars melinda wants to know the angle of elevation of a star above the horizon. based on the figure, what is the angle of elevation? is this angle an acute, right, or obtuse angle?

Explanation:

2.

A rectangle also has four right - angle corners by its geometric definition.

Step1: Read the protractor

The angle measured on the protractor is approximately $70^{\circ}$.

Step2: Classify the angle

Since an acute angle is between $0^{\circ}$ and $90^{\circ}$, a right angle is $90^{\circ}$, and an obtuse angle is between $90^{\circ}$ and $180^{\circ}$, and $70^{\circ}<90^{\circ}$.

Answer:

Rectangle

3.