Find the area of the triangle with ∠a = 86, b = 4 ft, and c = 3 ft. round your answer to two decimal places.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi