Which answer is the best explanation for how to check to see that the difference has been calculated correctly for this problem?
76.5 – 4.32 = 72.18
a.
add the first and second numbers to get the difference.
b.
add the difference to the second number to get the first number.
c.
subtract the second number from the difference to get the first number.
d.
add the first number and the difference to get the second number.

Match the term on the left with its image or description on the right. match term definition diameter a) circle a and a line segment connecting points b and c which are on the circle. circumference b) circle a and a line segment connecting points b and c which are on the circle. radius c) a piece of the circumference of a circle secant d) two circles that share the same center. concentric circles e) the distance around a circle arc f) a segment between two points on a circle that passes through its center

Given: △abc, ab=15, bd=9 ad ⊥ bc , m∠c=30°. find: the perimeter of the triangle.

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°