Angle Explorer: Journey to Geometry Mastery

1. 1. Which triangle has 3 equal sides?

• A. Isosceles triangle

• B. Scalene triangle

• C. Right-angled triangle

• D. Equilateral triangle

How are triangles classified?

• They are classified according to sides only.

• They are classified according to angles only.

• They are classified according to sides and angles.

• They are classified according to their interior angles.

What is the sum of the interior angles of a triangle?

• 90 degrees
• 180 degrees
• 360 degrees
• 270 degrees

Which of the following statements is NOT true about

quadrilaterals?

• Any 4-sided polygon is a quadrilateral

• A quadrilateral that is divided diagonally forms

  2 triangles

• A triangle is a 3-sided polygon

• All angles of quadrilaterals are the same

Equilateral triangles are always _____.

• acute

• scalene
• isosceles
• right-angled

Which triangle has no congruent sides?

• Right triangle
• Isosceles triangle
• Scalene triangle
• Equilateral triangle

Which figure shows an isosceles triangle?

• 
• 
• 
• 

If a triangle has two sides of the same length, what type is it?

• Isosceles triangle
• Equilateral triangle
• Right-angled triangle
• Scalene triangle

This triangle has one angle greater than 90 degrees.

• Acute triangle
• Equilateral triangle
• Right triangle
• Obtuse triangle

How will you describe an equilateral triangle?

• A triangle with two sides of equal length
• A triangle with all three sides of different lengths
• A triangle with one acute angle
• A triangle with all three sides of equal length.