Read the excerpt from Holes. He looked out the window at the vast emptiness. He watched the rise and fall of a telephone wire. In his mind he could hear his father's gruff voice softly singing to him.

How does the author reveal details about the character as he looks out the bus windows?

He describes how Stanley feels when he looks out the bus windows.
He describes Stanley’s thoughts when he looks out the bus windows.
He describes what Stanley sees when he looks out the bus windows.
He describes Stanley’s behaviors when he looks out the bus windows.

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.

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