Law of Sines (Sec 8-3) — Unit test

Question 1

Trigonometric area formula: Area =

Revolt · Accepted Answer

10.3 square units

Question 2

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 3

Heron’s formula: Area =

Revolt · Accepted Answer

81.33 square units

Question 4

Lian is making a banner for the school gym. She cut three pieces of fabric into congruent isosceles triangles, as shown.Trigonometric area formula: Area =

Revolt · Accepted Answer

417 square inches

Question 5

The perimeter of triangle XYZ is 24 units.

Revolt · Accepted Answer

14.7 square units

Question 6

Heron’s formula: Area =

Revolt · Accepted Answer

7 square meters

Question 7

Perimeter = 36 cmHeron’s formula: Area =

Revolt · Accepted Answer

62 square centimeters

Question 8

Trigonometric area formula: Area =

Revolt · Accepted Answer

29 units

Question 9

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 10

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)

Law of Sines (Sec 8-3) — Unit test Answers

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