Secondary School (English Medium) (5 to 8) Class 7 - CBSE Question Bank Solutions for Mathematics

By observing the number line in the following figure, state which of the following statements is true.

On the following number line value ‘Zero’ is shown by the point

If ⊗, O, ✓ and • represent some integers on number line, then descending order of these numbers is ______.

On the following number line, (–4) × 3 is represented by the point ______.

Can we have a rotational symmetry of order more than 1 whose angle of rotation is 45°?

Can we have a rotational symmetry of order more than 1 whose angle of rotation is 17°?

Taking today as zero on the number line, if the day before yesterday is 17 January, what is the date 3 days after tomorrow?

If the complement of an angle is 79°, then the angle will be of ______.

The angles x and 90° – x are ______.

The difference of two complementary angles is 30°. Then, the angles are ______.

If sum of measures of two angles is 90°, then the angles are ______.

In a pair of complementary angles, each angle cannot be more than ______ .

An angle is 45°. Its complementary angle will be ______.

Two right angles are complementary to each other.

One obtuse angle and one acute angle can make a pair of complementary angles.

An angle is more than 45°. Its complementary angle must be less than 45°.

The drawings below (Figure), show angles formed by the goalposts at different positions of a football player. The greater the angle, the better chance the player has of scoring a goal. For example, the player has a better chance of scoring a goal from Position A than from Position B.

In Parts (a) and (b) given below it may help to trace the diagrams and draw and measure angles.

1. Seven football players are practising their kicks. They are lined up in a straight line in front of the goalpost [Figure]. Which player has the best (the greatest) kicking angle?
2. Now the players are lined up as shown in figure. Which player has the best kicking angle?
3. Estimate atleast two situations such that the angles formed by different positions of two players are complement to each other.

In the following figure, P, Q and R are collinear points and TQ ⊥ PR, name; pair of complementary angles.

In the following figure, OR ⊥ OP. Name all the pairs of complementary angles.

Measures (in degrees) of two complementary angles are two consecutive even integers. Find the angles.