Types of Triangles Based on Sides

Q. If all the sides of a triangle are equal in length, then such a triangle is called an equilateral triangle.

1. False
2. True

Q.

Classify the triangle as the scalene, isosceles or equilateral triangle on the basis of their sides which have been given below-:

$5cm,12cm,9cm$

Q.

In which of the following triangles the altitude and medians are all same?

1. Isosceles triangle

2. Scalene triangle

3. Equilateral triangle

4. Right angle triangle

Q.

In the given figure, AB = AC. Side BA is produced to D such that BA = AD. $△$BDC is _______.

1. 60º

2. 30º

3. 120º

4. 90º

Q.

Classify the following triangles as scalene, isosceles, or equilateral according to the lengths of their sides.

(1) $15cm,20cm,15cm$

Q.

Classify this as scalene, isosceles or equilateral triangles according to the given lengths of their sides.

37 cm, 91 cm and 61 cm

Q.

Classify this as scalene, isosceles or equilateral triangles according to the given lengths of their sides.

$9\mathrm{cm},9\mathrm{cm}\mathrm{and}9\mathrm{cm}$

Q. 1.construct an isoceles triangle PQR such that PQ=PR=6.5 cm. angle PQR = 75 DEG.
using ruler and compass only constructr a circumircle to this triangle.
2. construct a triangle ABC such that AB = 6.5 cm'AC = 5.8 cm, angle a = 45 deg.
3. construct an isoceles triangle MNP such that base angle MNP is 30 deg. construct an incircle to this triangle and measure its radius.

Q. If two sides of a triangle are equal in length, then it is called a/an ______ triangle.

1. equilateral
2. scalene
3. isosceles
4. right

Q. If all the sides of a triangle are equal in length, then such a triangle is called an equilateral triangle.

1. False
2. True

Q. If two sides of a triangle are equal in length, then it is called a/an ______ triangle.

1. equilateral
2. scalene
3. isosceles
4. right

Q.

Classify the triangle as the scalene, isosceles or equilateral triangle on the basis of their sides which have been given below-:

$7cm,4cm,7cm$

Q.

Classify the triangle as the scalene, isosceles or equilateral triangle on the basis of their sides which have been given below-:

$2.8cm,2.8cm,2.8cm$

Q.

Name the type of the given triangle.

$∆ABC$ with $AB=8.7cm,AC=7cmandBC=6cm$.

Q.

Which of the following could represent the sides of a triangle?

1. 2, 4, 6

2. All of these

3. 3, 4, 5

4. 1, 2, 3

Q. In a triangle PQR, ∠Q = 130°.
What is the nature of ∠Q?

1. Acute angle
2. Straight angle
3. Obtuse angle
4. Right angle

Q.

In which of the following triangles the altitude and medians are all same?

Q. Triangle having all sides as 4 inch is called

1. Scalene triangle
2. Isosceles triangle
3. Right angle triangle
4. Equilateral triangle

Q.

State the given triangle whether it is scalene, isosceles or equilateral -

Q. If two sides of a triangle are equal in length, then it is called a/an ______ triangle.

1. scalene
2. right
3. isosceles
4. equilateral

Q. In a triangle PQR, ∠Q = 130°.
What is the nature of ∠Q?

1. Straight angle
2. Right angle
3. Acute angle
4. Obtuse angle

Q. Triangle having all sides as 4 inch is called

1. Isosceles triangle
2. Equilateral triangle
3. Right angle triangle
4. Scalene triangle

Q. Can an equilateral triangle also be isosceles?

Q.

In an equilateral triangle, the sides are __ in length