Question

(b) Each angle of an equilateral triangle measures
(c) If two sides of a triangle are equal to each other, then the triangle is called alan
.... triangle.
(d) A triangle is called an acute-angled triangle if all of its angles are
(e) A triangle is called a right-angled if one of its angles is a
angle​

Answer 1

Answer:

• equal
• isosceles triangle
• acute angles
• right angle

Answer 2

Answers:

1) Each angle of an equilateral triangle measures 60°.

2) If two sides of a triangle are equal to each other, then the triangle is called an isosceles triangle.

3) A triangle is called an acute-angled triangle if all of its angles are acute [below 90°].

4) A triangle is called a right-angled if one of its angles is a right angle.

Knowledge Bytes:

→ Classification of triangles

Triangles are classified into two types:

✳ On the basis of sides:

⏩ Equilateral triangle - A triangle with all the three sides equal.

⏩Isosceles triangle - A triangle with two sides equal.

⏩Scalene triangle - A triangle with all the three sides of unequal lengths.

✳ On the basis of angles

⏩Acute angled triangle - A triangle with all angles below 90°.

⏩Obtuse angled triangle - A triangle with one angle above 90°.

⏩Right angled triangle - A triangle with one angle of measure 90°.

→ A triangle will never have two angles of measure more than 90° as the total sum of all the angles must be 180° and if two angles are greater than  90°, then it will exceed the angle sum property.