Area and Perimeter of Triangles

Question 1

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 2

Heron’s formula: Area =

Revolt · Accepted Answer

81.33 square units

Question 3

Which expressions represent the area of triangle ABC? Select three options.

Revolt · Accepted Answer

One-half b c sine (60 degrees); One-half a squared sine (60 degrees); StartFraction a b sine (60 degrees) Over 2 EndFraction

Question 4

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

Revolt · Accepted Answer

30 units

Question 5

Heron’s formula: Area =

Revolt · Accepted Answer

7 square meters

Question 6

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

Area and Perimeter of Triangles Answers