Non-right-angled: Fluency & Practice
Mathematics
Grade 7
11 questions
~22 mins
1 views0 downloads
About This Worksheet
A worksheet focusing on calculating the area of non-right-angled triangles using the formula ½abSinC, aimed at developing procedural fluency and problem-solving skills for Grade 7 students.
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Full preview • 11 questions
Non-right-angled: Fluency & Practice
Subject: MathematicsGrade: Grade 7
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Untitled Worksheet
Grade Grade 7
A
Practice Questions
Answer all questions. Show your working in the grid spaces provided.
1.
Calculate the area of a triangle with sides a = 8 cm, b = 6 cm, and the included angle C = 60°. Use the formula ½abSinC.
[3 marks]2.
Given sides a = 10 m, b = 7 m, and angle C = 45°, find the area of the triangle.
[3 marks]3.
If two sides of a triangle are 9 cm and 12 cm, and the included angle is 80°, what is the area?
[3 marks]4.
Construct a triangle with sides 7 cm, 9 cm, and an included angle of 50°. Calculate its area.
[4 marks]5.
A triangle has sides a = 5 m, b = 8 m, with angle C = 70°. Find the area.
[3 marks]6.
In a triangle, sides are 6 cm and 10 cm, and the included angle is 100°. Calculate the area.
[3 marks]7.
Determine the area of a triangle with sides 11 cm, 13 cm, and included angle 120°.
[3 marks]8.
A triangle has sides of 15 m and 20 m, with the included angle of 85°. Calculate the area.
[3 marks]9.
A triangle with sides 14 cm and 9 cm has an included angle of 45°. Find its area.
[3 marks]10.
Using the formula ½abSinC, compute the area of a triangle with sides 12 cm and 16 cm, and included angle 90°.
[4 marks]11.
A triangle has sides a = 9 m, b = 12 m, and the included angle C = 110°. Calculate the area.
[3 marks]Quick Actions
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Details
- Created
- 1/1/2026
- Updated
- 1/1/2026
- Type
- worksheet