Continue with Microsoft TeamsOntario Curriculum Expectation:
6.E2.3 use the properties of supplementary angles, complementary angles, opposite angles, and interior and exterior angles to solve for unknown angle measures.
Any polygon can be made up of a different number of triangles.
And the pattern continues…
The above only works for polygons that are convex.
Finding the Unknown Angle
Shape: Pentagon (5 sides)
Sum of interior angles: 540º
Interior angles: 132º, 90º, 74º, 129º, ?º
132° + 90° + 74° + 129° + ?º = 540°
? = 540° − 132° − 90° − 74° − 129°
? = 115°
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1 of 101. Question
1. Identify if the polygon is concave or convex.
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2 of 102. Question
2. Identify if the polygon is concave or convex.
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3 of 103. Question
3. Identify if the polygon is concave or convex.
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4 of 104. Question
4. Identify if the polygon is concave or convex.
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5 of 105. Question
5. Find the measure of the unknown angle.
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6 of 106. Question
6. Find the measure of the unknown angle.
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7 of 107. Question
7. Find the measure of the unknown angle.
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8 of 108. Question
8. Find the measure of the unknown angle.
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°
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9 of 109. Question
9. Find the measure of the unknown angle.
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°
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10 of 1010. Question
10. Find the measure of the unknown angle.
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°
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