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Classification of Triangles Based on Angles

Name the type...

Question

Name the type of the triangle:
$△ D E F$ with $∠ D = 90^{o}$

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Solution

It is given that in $Δ D E F,$ $∠ D = 90^{\circ}$

Since, one of the angles of the given triangle is a right angle, therefore, the given triangle is a right angled triangle.

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Question 1 (d)

Name the type of the following triangle:

$Δ D E F$ with $∠ D = 90^{\circ}$

Q. Bisectors of angles

A, B

C

A B C

intersect its circumcircle at

D, E

F

respectively. Prove that the angles of the triangles

D E F

90^{o} - \frac{1}{2} A

90^{o} - \frac{1}{2} B

90^{o} - \frac{1}{2} C

△ A B C, ∠ A = 90^{o}

∠ B = 30^{o}

△ D E F, ∠ E = 30^{o}

∠ F = 60^{o}

Are triangles similar & if yes, name the similarlty criteria?

Δ D E F

in the given figure is a right-angled triangle with

∠ E = 90^{\circ}

. What type of angles are

∠ D

∠ F

Q. Name the following triangle :

∠ A = 60^{o}, ∠ B = 90^{o}, ∠ C = 30^{o}

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Classification of Triangles Based on Angles

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