Question

use a
Protractor to draw an angle of
80°. Also draw the angle leise for
of the langle using compasses and circle​

Answer 1

Step-by-step explanation:

1. Draw a ray OA

2. With the help of a protractor , construction ∠ BOA = 80 °

3. Taking O as center and any suitable radius , draw an arc to intersect rays OA and OB at points P and Q respectively .

4. Take radius more than half the radius OP. With this radius make an arc from point P and Q which will intersect at X . By joining O and X we get bisector of ∠AOB .

Let ray OC be the bisector of ∠ BOA , then ∠ COA =  1/2 ∠ BOA =    1/2 ×80  ∘  =40  ∘

5. With Q as center and radius equal to PQ , draw an arc to cut the extended arc PQ at R . Join OR and produce it to form ray OD , then ∠ DOA = 2∠ BOA = 2×80  ∘  =160  ∘  .

Bisect ∠ DOB as done in step 4. Let OE be the bisector of ∠ DOB is then  

∠ EOA = ∠ EOB + ∠ BOA =    1

/2 ∠ DOB + ∠ BOA =  

1

/2 (80)  ∘+80  ∘  =40  ∘  +80  ∘  =120  ∘