Name the type of triangle: $∆ L M N w i t h m ∠ L = 30 °, m ∠ M = 70 ° a n d m ∠ N = 80 °$ .

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Solution

An acute angled triangle is a triangle in which all the interior angles are acute angles i,e less than $90 °$ .
$∆ L M N$ has all three angles an acute angle.
Hence, $∆ L M N$ is acute angled triangle.

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Question 1 (f)

Name the type of the following triangle:

$Δ L M N$ with $∠ L = 30^{\circ}, ∠ M = 70^{\circ} a n d ∠ N = 80^{\circ}$ .

Name the type of triangle:

$△ L M N$ with $∠ L = 30 °$ , $∠ M = 70 °$ and $∠ N = 80 °$

△ A B C, m ∠ A + m ∠ C = m ∠ B

A C : A B = 25 : 24

B C = 21

△ A B C

Δ A B C

Δ D E F

B C = 6 cm, A C = 4 cm, m ∠ B = 35^{\circ},

E F = 6 cm, D F = 4 cm, m ∠ E = 35^{\circ}

Δ A B C ≅ Δ D E F

△ L M N

m ∠ L = 30^{\circ}, m ∠ M = 70^{\circ}

m ∠ N = 80^{\circ}

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