Year 8
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Lesson details
Key learning points
- In this lesson, we will learn about how to problem solve with angles in polygons, along with learning notations for referring to angles.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
The exterior angles of a hexagon sum to 540 degrees.
True
Q2.
A triangle ALWAYS has each exterior angle as 60 degrees.
True
Q3.
The general formula for working out the mean exterior angle of an n-sided polygon is...
180(n-2)
360
n/360
Q4.
The calculation to work out the sum of the interior angles for an octagon would be...
180 x n
360 x
360(8 - 2)
Q5.
180n - 360 is a generalisation that tells us the...
Sum of the angles around a point
Sum of the angles on a straight line
Sum of the total exterior angles of a polygon
5 Questions
Q1.
Squares tesselate with each other.
False
Q2.
Equilateral triangles tesselate with each other.
False
Q3.
ABC is a triangle. Angle ABC is 90 degrees. Angle BAC is 23 degrees. Angle CAB is...
57 degrees
67 degrees
90 degrees
Q4.
ABC is a triangle. Angle ABC is 90 degrees. Angle BAC is 23 degrees. Angle CBA is...
23 degrees
57 degrees
67 degrees
Q5.
ABC is a triangle. Angle ABC is 90 degrees. Angle BAC is 23 degrees. Angle ACB is...
23 degrees
77 degrees
90 degrees