Two lines are said to be perpendicular if angle between them is ___________________

Instrument in the geometry box having the shape of a triangle is called _________ .

Two lines are perpendicular if they intersect each other at ____________

Prependicular bisector of a line segment :

Perpendicular bisector of a line segment

A straight line can be bisected in ______ right angles.

Following are the steps while constructing a perpendicular to line 'l' through a point 'P' not on it. Out of these one of the step is INCORRECT. Select the INCORRECT step.

• Step 1 : Given a line l and a point P not on it.
• Step 2 : With P as centre, draw an arc which intersects line l at two points L and M.
• Step 3 : With any convenient radius and with L and M as centres, construct two arcs that intersect at a point, say B, on the other side.
• Step 4: Point B and P lie on the same side.

Perpendicular bisector of a chord of  a circle  is _____________.

Two lines are perpendicular of they intersect each other at ___________________

Number of lines passing through five points such that no three of them are collinear is ________________________