Test
Angles
Angle calculation involves various operations such as addition, subtraction, multiplication, and division of angles. These calculations are often performed using trigonometric functions.
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Sample questions
- Find the angle AOB measuring clockwise.
- Triangle ABC is isosceles. Find angle ABC, knowing that angle CAB is ___°.
- Triangle ABC is isosceles. Find angle CAB, knowing that angle ABC is ___°.
- Find angle ABD, knowing that angle ADC is ___°, and angle DAB is ___°.
- In the diagram, a rectangle is depicted. Find angle AOD, knowing that angle ADO is ___°.
Angle calculations
Angles on a straight line total 180°, angles around a point total 360°, and parts of a right angle total 90°. Identify the relationship shown before calculating.
Triangles and intersecting lines
The angles of a triangle total 180°, and vertically opposite angles formed by intersecting lines are equal. A diagram may not be to scale, so use labels and stated values.
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