Question 15(Multiple Choice Worth 1 points) (07.05 LC)
What is the value of a in the equation a = 2 + 3a + 10?
O 12
06
0-6
O-12

60: 45 =12: 9 =4: 3 so the answer is 4: 3

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°.

the answer is 23.39370079

step-by-step explanation: