Construct A PQR in which <R=80°, RQ=4cm and RP= 3cm.
7. The Circumference of a Circle is 1256 cm find its
Answers
Answer:
1. Draw a line segment PQ of length 3 cm. 2. With Q as center and radius 4 cm, draw an arc. 3. With P as center and radius 5 cm, draw an arc intersecting the previously drawn arc at R. 4. Join PR and OR to obtain the required triangle. 5. From Q, cut arcs of equal radius intersecting PQ and QR at M and N, respectively. 6. From M and N, cut arcs of equal radius intersecting at point S. 7. Join QS and extend to produce the angle bisector of angle PQR. 8. Verify that angle PQS and angle SQR are equal to 45° each.
second que
Circumference of the circle is equal to 2πr where r is the radius of the circle or πd where d is the diameter of the circle.
πd
3.14d
d
=1256
=1256
=400 cm
Hence, diameter of the circle is equal to 400 cm.
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