Angle properties of quadrilaterals Flashcards by Christopher Chee

Q

What is the sum of angles in a quadrilateral?

A

A quadrilateral can be divided into 2 triangles

Hence the sum of angles is 360º

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Q

Find angle x

A

x = 106º (opp angle of rhombus)

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Q

Find angle y

A

y = 180º - 68º (interior angle)

= 112º

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Q

Find angle x

A

x = 180º - 72º (interior angle)

= 108º

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Q

Find angle a

A

a = 360º - 93º - 93º - 65º

= 109º

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Q

Find angle z

A

z = 360º - 125º - 77º - 100º

= 58º

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Q

Find angle x

A

x = 180º - 118º

= 62º

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Q

Find angle x

A

x = 90º (diagonals of squares are perpendicular)

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Q

Find angle x

A

x = 180º - 117º (angles on a straight line)

= 63º

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Q

Find angle y

A

y = 57º (vert opp angles)

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