There are 88 keys on a piano. of these 88 keys,22 are black and 66 are white. what is the ratio of black keys to white keys? a 1/3b 1/4c 2/3d 3/4 which equation shows the distributive property of multiplication over addition? a (3×2 )+(3×8)=(2×3)+(8×3)b (3×2)+8=6+8c (3×2)+(3×8)=3×(2+8)d (3×2)+(3×8)=(3×8)+(3×2) show work

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

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°.