Test : Shapes and Angles - Class 5 MCQ

Measure of angle drawn by Danish = 140°
 Measure of angle drawn by Manish = 2 x 140° = 280 = (360 - 240)  =  80°

First Figure: This is a curved shape without any straight lines meeting at 90º.
No perpendicular lines.

Second Figure: This figure has several straight lines forming right angles (e.g., in the center).
Contains perpendicular lines.

Third Figure: This is a spade-like shape with no straight lines intersecting at 90º.
No perpendicular lines.

Fourth Figure: This arrow-like shape has straight lines meeting at 90º (e.g., the vertical and horizontal lines at the tip).
Contains perpendicular lines.

EF is perpendicular to AB

The given angle is a acute angle.
The approximate value of above angle is 45°
 , as the angle of 20°  would be very small than the given angle Hence the correct answer is option B.

An angle between 90 and 180 degree is called an obtuse angle.