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Question

# Construct circumcircle of the triangle ABC such that BC = 4 cm, ∠ACB=45∘ and perpendicular from A to BC is 2.5 cm. Circumradius is .

A
2 cm
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B
2.5 cm
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C
1.5 cm
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Solution

## The correct option is A 2 cmSteps of Construction: i) Draw a line segment BC = 4cm. ii) At C,draw a perpendicular CX and cut off CE = 2.5 cm. iii) From E,draw another perpendicular EY. iv) From C,draw a ray making an angle of 45∘ with CB,which intersects EY at A. v) Join AB. Triangle ABC is the required triangle. vi) Draw perpendicular bisectors of sides AB and BC intersecting each other at O. vii) With centre O,and radius OB,draw a circle which will pass through A. B and C. Measure the radius OB = OC = OA = 2 cm

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