Area and Perimeter of Triangles

Question 1

sin(B) = , so

Revolt · Accepted Answer

h/c

Question 2

h = , and

Revolt · Accepted Answer

csin(B)

Question 3

Area =

Revolt · Accepted Answer

1/2acsin(B)

Question 4

= (x)(5)sin().

Revolt · Accepted Answer

72°

Question 5

Solving for x and adding this value to the length of the other sides, the perimeter ≈ (rounded to the nearest tenth).

Revolt · Accepted Answer

13.1 ft

Question 6

The bottom side of the flag measures 5 feet because the triangle is . Because , the trigonometric triangle formula is used to calculate that the area is (5)(5)sin(36°) ≈ 7.35 square feet. Recalling that this triangle is isosceles, we can write the area equation to solve for x.

Revolt · Accepted Answer

an isosceles triange

Question 7

Area = square units

Revolt · Accepted Answer

13.5

Question 8

The bottom side of the flag measures 5 feet because the triangle is . Because , the trigonometric triangle formula is used to calculate that the area is (5)(5)sin(36°) ≈ 7.35 square feet. Recalling that this triangle is isosceles, we can write the area equation to solve for x.

Revolt · Accepted Answer

SAS information is known

Question 9

= (x)(5)sin().

Revolt · Accepted Answer

7.35

Area and Perimeter of Triangles Answers

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