The diagram shows the layout of the township playground. The playground committee is ordering rubber mulch to cover the playground surface. A playground is made up of a rectangle and a triangle. The rectangle has a base of 40 feet and height of 25 feet. The triangle has a base of 22 feet and height of 20 feet. Which shows how to calculate the area of the playground? A = 40 times 25 + one-half (18) (20) A = 40 times 25 + one-half (22) (20) A = 20 times 25 + one-half (25) (20) A = 20 times 18 + one-half (40) (25)

answer:   y=2x-3

step-by-step explanation:

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°.