Topics
8. Triangle Trigonometry
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United States of America
Grades 9-12

8.07 Area of triangles

Lesson
Practice
Adaptive
Worksheet

Interactive practice questions

Calculate the area of the following triangle.

Round your answer to two decimal places.

A triangle is depicted with the measurements of its two sides and their included angle. The included angle, highlighted by a blue-shaded arc, measures $50^\circ$50° and is adjacent to sides measuring $12$12 m and $13.1$13.1 m.
Medium
2min

Calculate the area of the following triangle.

Round your answer to two decimal places.

Medium
1min

Calculate the area of the triangle.

Round your answer to two decimal places.

Medium
< 1min

Calculate the area of the triangle.

Round your answer to two decimal places.

Medium
< 1min
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Outcomes

G.SRT.D.9 (+)

Derive the formula a = 1/2 ab sin(c) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.

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