3B Maths Ch.8 revision

3B Maths Ch.8 revision

By Wang Kwong

Angles Related to Parallel Lines

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In the figure, CED is a straight line. AB // CD, ÐBAE = 42° and ÐACE = 82°. Find the value of x. (No need to input unit)

Properties of a parallelogra

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Conditions for Parallelograms

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Conditions for Parallelograms

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ABCD is a parallelogram. Find the unknown(s)

(input x before y, use comma to separate the answers)

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ABCD is a parallelogram. Find the unknown(s)

(input x before y, use comma to separate the answers)

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ABCD is a parallelogram. Find the unknown(s)

(input x before y, use comma to separate the answers)

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ABCD is a parallelogram. Find the unknown(s)

(input x before y, use comma to separate the answers)

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ABCD is a parallelogram. Find the unknown(s)

Definition of other quadrilaterals

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Relationship map

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ABCD is a rhombus. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a rhombus. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a rhombus. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a rectangle. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a rectangle. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a rectangle. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a square. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a square. Find the values of x and y.

(input x before y, use comma to separate the answers)

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ABCD is a square. Find the values of x and y.

(input x before y, use comma to separate the answers)

Mid-point theorem

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Intercept Theorem

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Intercept Theorem

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Find the value of x.

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Find the value of x.

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Find the value of x.

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Find the value of x.

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Find the value of x.

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Find the value of x.

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In the figure, ADB and AEC are straight lines. DE = 10, ÐDAE = 85° and ÐABC = 38°. Find the values of x and y.

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In the figure, E, F and G are the mid-points of AB, AD and AC respectively. ∠ABC = 56°, ∠AGE = 38°, ∠FGC = 115° and ∠ADC = 62°. Find ∠EAF.

End of Ch.8 revision

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