Area and Perimeter of Triangles

Question 1

Heron’s formula: Area =

Revolt · Accepted Answer

81.33 square units

Question 2

Triangle LMN has sides measuring 7 meters and 6 meters and a perimeter of 16 meters.Heron’s formula: Area =

Revolt · Accepted Answer

9 square meters

Question 3

Trigonometric area formula: Area =

Revolt · Accepted Answer

10.3 square units

Question 4

Lila made a triangular flag to cheer on her favorite sports team. The perimeter of the flag is 20 inches.Heron’s formula: Area =

Revolt · Accepted Answer

15 square inches

Question 5

Heron’s formula: Area =

Revolt · Accepted Answer

7 square meters

Question 6

Which triangle’s area can be calculated using the trigonometric area formula?

Revolt · Accepted Answer

Triangle K L M is shown. The length of K L is 29 and the length of K M is 15. Angle L K M is 35 degrees.

Question 7

Jace ordered a banner in the shape of a parallelogram from a print shop.Heron’s formula: Area =

Revolt · Accepted Answer

$92.30

Question 8

Consider the diagram and the derivation below.Given: In △ABC, AD ⊥ BCDerive a formula for the area of △ABC using angle C.

Revolt · Accepted Answer

absin(C)

Question 9

The area of parallelogram WXYZ is approximately 45 square units.Trigonometric area formula: Area =

Revolt · Accepted Answer

30 units

Question 10

Trigonometric area formula: Area =

Revolt · Accepted Answer

8.4 square units

Area and Perimeter of Triangles Answers