Question 15 of 28intermediate🔍 AnalyzeShort Answer3 marks

How are the angles of triangles and rectangles similar or different?

Correct Answer

Triangles and rectangles differ in their angle properties:

Triangles:

  • Three angles that always add up to 180°
  • Rigid — angles don't change when pushed
  • Maintain their shape

Rectangles:

  • Four angles that are all right angles (90° each)
  • Sum of angles = 360°
  • Not rigid — angles can change when pushed
  • Can deform
Exercise: Shapes with Straws | Q: 62 | (Page Page 14)
For More Understanding

Explanation

The chapter compares the rigidity of triangles with the flexibility of rectangles, explaining why triangles are used in construction for stability.

Solution Steps

  1. Triangles have three angles that always add up to 180°.

  2. Triangles are rigid — angles don't change when pushed.

  3. Triangles maintain their shape.

  4. Rectangles have four angles that are all right angles (90° each).

  5. Rectangles have a sum of angles equal to 360°.

  6. Rectangles are not rigid — angles can change when pushed.

  7. Rectangles can deform.

PreviousNext