Q. Construct the following angles without using protractor and write steps of Construction:- a) 120°
b)90°
Answers
Step-by-step explanation:
a.) 120°
Step of Construction:
(i) Draw a ray OA.
(ii) With O as centre and any suitable radius draw an arc cutting OA at B.
(iii) With B as centre and the same radius cut the arc at C, then with C as centre and same radius cut the arc at D. Join OD and produce it to E.
∠AOE = 120°.
b.) 90°
Step 1: Draw the arm PA.
Step 2: Place the point of the compass at P and draw an arc that cuts the arm at Q.
Step 3: Place the point of the compass at Q and draw an arc of radius PQ that cuts the arc drawn in Step 2 at R.
Step 4: With the point of the compass at R, draw an arc of radius PQ to cut the arc drawn in Step 2 at S.
Step 5: With the point of the compass still at R, draw another arc of radius PQ near T as shown.
Step 6: With the point of the compass at S, draw an arc of radius PQ to cut the arc drawn in step 5 at T.
Step 7: Join T to P.∠APT is 90°