Calculate the size of one interior angle of a regular polygon with 40 sides.
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Angles in Polygons & Parallel Lines
Calculate the size of one interior angle of a regular polygon with 40 sides.
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Find the interior angle of a regular polygon with 24 sides.
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In the diagram, AC and BD are straight lines.
Find the value of and the value of
.
= ...................................................
= ...................................................
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The interior angle of a regular polygon with sides is 150°.
Calculate the value of .
................................................
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A regular polygon has 72 sides.
Find the size of an interior angle.
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The diagram shows two parallel lines PAQ and SBCT.
AB = AC and angle QAC = 43°.
Find the value of .
.......................................
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is parallel to
,
is an isosceles triangle and
is a straight line.
Find the value of .
= ..............................................
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The diagram shows two regular pentagons.
Pentagon is an enlargement of pentagon
, centre
.
Find angle .
Angle = ....................................................
The area of pentagon is
.
The area of pentagon is
.
Find the ratio perimeter of pentagon : perimeter of pentagon
in its simplest form.
......................... : .........................
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In a regular polygon, the interior angle is 11 times the exterior angle.
i) Work out the number of sides of this polygon.
[3]
ii) Find the sum of the interior angles of this polygon.
[2]
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is a parallelogram.
Angle .
Angle .
Angle .
Calculate the size of angle .
You must give reasons for your answer.
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The diagram shows a triangle and a quadrilateral. All angles are in degrees.
i) For the triangle, show that .
[1]
ii) For the quadrilateral, show that .
[1]
iii) Solve these simultaneous equations.
Show all your working.
= ...................................................
= ................................................... [3]
iv) Find the size of the smallest angle in the triangle.
[1]
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Show that each interior angle of a regular pentagon is .
The diagram shows a regular pentagon .
The vertices of the pentagon lie on a circle, centre , radius
.
is the midpoint of
.
i) Find .
= ........................................ cm [3]
and
are straight lines.
iia) Find .
= ........................................ cm [3]
iib) Calculate the area of triangle .
........................................ cm2 [3]
How did you do?
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The diagram shows a regular 10-sided polygon,
Show that .
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