If one angle in a triangle is 80° and another is 60°, what is the measure of the third angle?

The area of a parallelogram is given by the formula:

• (A) $\boxed{30 \text{cm}^2}$

16. If one angle in a triangle is $80^\circ$ and another is $60^\circ$, what is the measure of the third angle?

The sum of the interior angles of any triangle is $180^\circ$.

• (A) $\boxed{40^\circ}$

17. Raw or original information is called-----

• (A) Data Data refers to raw facts or figures collected for analysis.

18. An angle measured in a clockwise direction from north is known as

• (B) Bearing A bearing is an angle measured clockwise from the North direction.

19. Angle that is more than $90^\circ$ but less than $180^\circ$ is called what?

• (B) Obtuse angle An obtuse angle is an angle that measures greater than $90^\circ$ but less than $180^\circ$.

20. What is the sum of angles at a point?

• (A) $360^\circ$ The sum of angles around a central point is always $360^\circ$.

21. A triangular base prism has base 3cm and height 4cm. If the total height is 5cm. Calculate the volume.

Assuming the base and height of the triangle are perpendicular, the area of the triangle is:

The volume of a prism is the area of its base multiplied by its total height.

• (A) $\boxed{30 \text{cm}^3}$

22. A trapezium has parallel sides of 8 cm and 12 cm, with a height of 5 cm. What is its area?

The area of a trapezium is given by:

where $a$ and $b$ are the lengths of the parallel sides, and $h$ is the height.

• (A) $\boxed{50 \text{cm}^2}$

23. What is the size of each angle in an equilateral triangle?

An equilateral triangle has three equal sides and three equal angles.

Since the sum of angles in a triangle is $180^\circ$, each angle in an equilateral triangle is:

• (C) $\boxed{60^\circ}$

24. A triangle with two sides and base angles equal is called...

• (B) Isosceles triangle An isosceles triangle is a triangle that has two sides of equal length, and the angles opposite these sides (base angles) are also equal.

25. The volume of a cube is $64 \text{ cm}^3$. What is the length of each edge?

The volume of a cube is given by:

where $s$ is the length of an edge.

To find $s$, take the cube root of both sides:

• (A) $\boxed{4 \text{ cm}}$

26. What is true about alternate angles when two parallel lines are cut by a transversal?

• (A) They are equal When two parallel lines are intersected by a transversal, the alternate interior angles and alternate exterior angles are equal.

27. What does a balanced scale demonstrate in solving equations?

• (B) Subtraction A balanced scale demonstrates the principle of equality in equations. When solving equations, any operation (like addition, subtraction, multiplication, or division) performed on one side must also be performed on the other side to maintain the balance (equality). Subtraction, for example, can be demonstrated by removing equal weights from both sides of the scale.