Given that ji⊥kl and kh≅hl, find ki.

a. 3.9
b. 5
c. 7
d. 8

  D.  8

Step-by-step explanation:

The given information tells you that HI is the perpendicular bisector of KL, so triangles HIK and HIL are congruent. Then ...

  KI = LI

  3x -7 = x +3

  2x = 10 . . . . . . add 7-x

  x = 5

  KI = 3x -7 = 3(5) -7

  KI = 8

50.27 cm²

Step-by-step explanation:

Subtract the area of the smaller circle from the area of the larger circle

The area of a circle = πr² ( r is the radius )

area = π × 5² - π × 3² = 25π - 9π = 16π ≈ 50.27 cm² ( nearest hundredth )