When can a parallelogram also be called a rectangle?

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Step-by-step explanation:

A rectangle is is a type of parallelogram with four right angles.

A parallelogram can be called a "Rectangle" when all its angles measure 90° (right angles).

Step-by-step explanation:

You need to remember the following definitions:

1. A quadrilateral is a polygon that has four straight sides.

2. A parallelogram is a quadrilaleral whose opposite sides are parallel and its opposite angles equal.

3. A rectangle is a quadrilateral whose opposite sides are parallel and have equal lenght. Every angle of a rectangle measure 90 degrees.

Based on this, you can conclude that a rectangle is a  parallelogram.

Therefore, a parallelogram can be called a "Rectangle" when  all its angles measure 90° (right angles).

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

christopher is 272,195 year old

step-by-step explanation: