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Question

Construct a segment of a circle on a chord of length 5 cm containing the following angles.
i. 90o ii 45o iii 120o

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Solution

(i) 90 :
Steps of construction :
Step 1: Draw a line segment AB=5 cm.
Step 2: Draw an angle of 45 on point A and B to intersect at O.
Step 3: With centre O and radius OA and OB, draw the circle.
Step 4: Mark a point C on the arc of the circle. Join AC and BC. We get CAB=90.
Thus, ACB is the required circle segment.

(ii) 45 :
Steps of construction :
Step 1: Draw a line segment AB=5 cm
Step 2: Draw an angle of 45 on point A and B to intersect at O.
Step 3: With centre O and radius OA and OB, draw the circle.
Step 4: Mark a point C on the arc of the circle. Join AC and BC. We get ACB=45.
Thus, ACB is the required circle segment.

(iii) 120
Steps of construction :
Step 1: Draw a line segment AB=5 cm
Step 2: Draw an angle of 30 on point A and B to intersect at O.
Step 3: With centre O and radius OA and OB, draw the circle.
Step 4: Mark a point C under the chord AB and on the arc of the circle.
Step 5: Join AC and BC. We get A0B=240.
Thus, ACB is the required circle segment.

1690790_569005_ans_3ee20098ca4d4b6c985261d9e174cf2b.png

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