Find the number of acute angled triangles in the above set of triangles.

 

 

 

Classify the following triangle as scalene, isosceles, or equilateral.

Is ∆ABC an acute angled triangle?

Name the types of following triangles:

Triangle with lengths of sides $7 \mathrm{c}\mathrm{m}, 8 \mathrm{c}\mathrm{m}$ and $9 \mathrm{c}\mathrm{m}$

Classify the triangle with the following measures of sides as scalene, isosceles, or equilateral.

$4 \mathrm{cm}, 2 \mathrm{cm}, 4 \mathrm{cm}$

In a triangle PQR, $\angle$P = $110°$,$\angle$Q = $45°$ and$\angle$R = $25°$.

Determine the type of triangle based on the angles.

Classify the triangle with the following measures of sides as scalene, isosceles, or equilateral.

$2 \mathrm{cm}, 3 \mathrm{cm}, 4 \mathrm{cm}$

In the triangle ABC $\angle$A = $45°$, $\angle$B = $75°$, and $\angle$C = $60°$.

Therefore, ∆ABC is a/an

In a ∆XYZ, $\angle$X = $41°$, $\angle$Y = $59°$ and $\angle$Z = $80°$.

What kind of a triangle is ∆XYZ?

In the figure below, $\angle DBC=x°$, find the value of $x$.

Identify the obtuse angled triangle from the given options.

Classify the following as an acute triangle, obtuse triangle, or right triangle.

Which of the following rightly describes the triangle?

Try to construct triangles using match sticks. Some are shown here. Can you make a triangle with
$3$ matchsticks?
(Remember you have to use all the available matchsticks in each case)
Name the type of triangle in each case.
If you cannot make a triangle, think of reasons for it.

What kind of triangle is QRS?