A 90⁰ angle is exactly half of a ________

Concentric Circles have same centre but different________

Two lines are perpendicular if they intersect each other at ____________

What type of angle is 60 degree ?

Name that Geometrical instrument having a semi-circular shape graduated into 180⁰ parts.

A 90⁰ angle lies exactly between______ and ________ degree angles.

Which of the following step is Incorrect to construct an angle of as shown in the figure below:

How many arcs are required to be drawn to construct  an angle of 60⁰ ?

How many arcs are drawn to construct an angle of 90⁰ ?

Arrange the steps in correct order to make the construction in the diagram:-

1.Draw a ray OA.

2. With R as centre and the same radius, draw an arc

3. With O as centre and any convenient radius, draw an arc, cutting OA at P.

4. With S as centre and the same radius,draw an arc, cutting the arc drawn in step V at T

5. Draw OT and produce it to B.

6. With R as centre and the same radius as in steps II and III, draw an arc, cutting the arc drawn in step III at S.

7. With P as centre and the same radius, draw an arc cutting the arc drawn with O as centre at R..