polygons circles (27-05-2025)

REVISE

By WINCENTRE CP1

Multiple Choice

What is the name of the topmost vertex of a triangle?

• Apex

• Base

• Centroid

• Median

Multiple Select

Which properties are true for an equilateral triangle?

• All sides are equal

• All angles are equal

• One angle is 90 degrees

• Each angle is 60 degrees

Fill in the Blank

A triangle with all angles less than ___ degrees is called an acute triangle.

Multiple Choice

What is the sum of the internal angles of a quadrilateral?

• 360°

• 180°

• 90°

• 270°

Fill in the Blank

A parallelogram has opposite sides that are ___ to each other.

Multiple Select

Which of the following are types of parallelograms?

• Square

• Rectangle

• Rhombus

• Rhombus and Rhomboid

Multiple Choice

What is the area of a circle with a radius of ‘r’?

• πr²

• πr/2

• 2πr

• 4πr

Explanation Slide...

Area of circle = πr² = π(d/2)² = πd²/4 for semi-circle.

Multiple Choice

What is the name called biggest chord of the circle?

• Arc
• Diameter
• Radius
• Diagonal

Explanation Slide...

The diameter is the longest chord in a circle, passing through the center.

Multiple Choice

Find the area of a trapezium whose parallel sides are 20 cm and 18 cm long and the distance between them is 15 cm.

• 225 cm²
• 275 cm²
• 285 cm²
• 315 cm²

Explanation Slide...

Area = ½ × (a + b) × h = ½ × (20 + 18) × 15 = 285 cm².

Multiple Choice

What is the part of a circle bounded by an arc and a chord called?

• Sector
• Tangent
• Segment
• Diameter

Explanation Slide...

A segment is the region between a chord and the corresponding arc of a circle.