The sum of angles on a straight line is:

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1. The use of pictorial representation of data is called

2. The sum of angles on a straight line is:

3. Two angles are complementary when their sum is equal to----

(D) 90 degrees Complementary angles are two angles whose sum is $90^\circ$ .

4. The following are methods of collecting data except

(B) Soccer Questionnaire, observation, and experiment are all methods of collecting data. Soccer is a sport.

5. Which tool is commonly used to collect data through questions?...........

(C) Questionnaire A questionnaire is a research instrument consisting of a series of questions for the purpose of gathering information from respondents.

6. What is the parallelogram with all its sides the same

(D) Rhombus A rhombus is a quadrilateral with all four sides of equal length. It is a type of parallelogram.

7. The following are the instruments for construction except

(D) Tape rule A protractor, pencil, and rule (ruler) are standard instruments for geometric construction. A tape rule is typically used for measuring longer distances and is less common for precise geometric drawings on paper.

8. What is the primary purpose of statistics?

(A) To describe data The primary purpose of statistics is to collect, organize, analyze, interpret, and present data, which includes describing it to understand its characteristics.

9. Vertically opposite angle are ----

(B) Equal Vertically opposite angles are formed when two lines intersect, and they are always equal.

10. Statistics is useful in all the following except...........

(C) Committing crimes Statistics is a valuable tool in fields like agriculture, health, and education for analysis and decision-making. It is not a tool for committing crimes.

11. What is the perimeter of an equilateral triangle of side 3cm?

Identify the properties of an equilateral triangle.
An equilateral triangle has three equal sides.
Calculate the perimeter.
The perimeter is the sum of the lengths of all sides.
$\text{Perimeter} = \text{side} + \text{side} + \text{side} = 3 \times \text{side}$ $\text{Perimeter} = 3 \times 3 \text{ cm} = 9 \text{ cm}$
- (B) $\boxed{\text{9cm}}$
12. The sum of angles in a triangle is equal to...
- (B) $180^\circ$ The sum of the interior angles of any triangle is always $180^\circ$ .
13. The exterior angle of a triangle is $120^\circ$ , and one interior opposite angle is $50^\circ$ . What is the other interior opposite angle?
Recall the exterior angle theorem.
The exterior angle of a triangle is equal to the sum of its two opposite interior angles.
Set up the equation.
Let the exterior angle be $E$ , and the two opposite interior angles be $A$ and $B$ .
$E = A + B$
Substitute the given values and solve for the unknown angle.
$120^\circ = 50^\circ + B$ $B = 120^\circ - 50^\circ$ $B = 70^\circ$
- (A) $\boxed{70^\circ}$

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