Plz

what is the missing reason in steps 7 and 8 of the proof?

a. definition of cosine in right triangle

b. definition of sine in right triangle

c. definition of tangent in right triangle

d. corresponding sides of congruent triangles are equal

e. definition of equilateral triangle

Option B. Definition of sine in right triangle.

Step-by-step explanation:

In step 7: ΔBAE,

The answer is definition of sine in right triangle. Because, In a right angled triangle, the sine of an angle is equal to the length of the opposite side divided by hypotenuse.

By definition,

Thus,

Thus, the answer is definition of sine in right triangle.

In step 8: ΔCAE,

The answer is definition of sine in right triangle. Because, In a right angled triangle, the sine of an angle is equal to the length of the opposite side divided by hypotenuse.

By definition,

Thus,

Thus, the answer is definition of sine in right triangle.

1.) 21

2.) 0.453

3.) 1.5

4.) 48

5.) $ 22

step-by-step explanation: