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Lesson details

Key learning points

  1. In this lesson, we will learn that the sum of the interior angles of a polygon can be found using triangles.

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.
ABCD forms a quadrilateral. What are the total interior angles of the quadrilateral?
180 degrees
36 degrees
Correct answer: 360 degrees
90 degrees
Q2.
Angle ABC is 98 degrees. What would the size of the reflex angle formed be on the exterior?
2 degrees
Correct answer: 262 degrees
360 degrees
82 degrees
Q3.
If I combined two equilateral triangles together with a shared side, what would the shape formed be called?
Equilateral triangle
Rectangle
Correct answer: Rhombus
Square
Q4.
Which of the following is not a rule used so far for angles?
Correct answer: Angles in a polygon always sum to 360 degrees
Angles on a straight line sum to 180 degrees
Interior angles in a triangle sum to 180 degrees
Q5.
If A + B + C = 180, D + E = 180 and F is a right angle, what does A + B + C + D + E + F equal?
180 degrees
360 degrees
Correct answer: 450 degrees
540 degrees

5 Questions

Q1.
The total sum of the interior angles of two triangles would be equal to...
180 degrees
Correct answer: 360 degrees
540 degrees
90 degrees
Q2.
If I have a regular pentagon, how many triangles from one distinct point internally can I create?
1
Correct answer: 3
4
5
Q3.
If I have a regular pentagon, what would the total interior angles sum to?
180 degrees
360 degrees
450 degrees
Correct answer: 540 degrees
Q4.
If I have a regular octagon, how many triangles from one distinct point internally can I create?
4
5
Correct answer: 6
8
Q5.
If I have a regular octagon, what would the total interior angles sum to?
Correct answer: 1080 degrees
1440 degrees
360 degrees
900 degrees

Lesson appears in

UnitMaths / Angles in polygons