Question

Can anyone help me to these question so please
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Answer 1

Answer:

2i scalene

2ii isosceles

2iiiscalene

2iv equi

Step-by-step explanation:

3ans

<R=180°-60°-56°

<R=64°

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Answer 2

2.(i) Scalene triangle

(ii) Isosceles triangle

(iii) Obtuse - angled triangle

(iv) Equilateral triangle.

3. According to the convention

$\boxed{\mathrm{Sum \: of \: all \: 3\: \angle \: s \: of \: a \: \triangle \: is \: 180°}}$

$\mathrm{So,\angle R = 180° - \angle P = 56° + \angle Q = 60°}$

$\mathrm{\angle R = 180° - 116°}$

$\mathrm{\therefore \angle R = 64°}$

$\boxed{\mathrm{ \mapsto Verification}}$

$\mathrm{ 56° + 60° + 64° = \boxed{180°}}$

4. According to the convention

$\boxed{\mathrm{Sum \: of \: all \: 3\: \angle \: s \: of \: a \: \triangle \: is \: 180°}}$

${3}^{rd} angle = 180° - 48° + 48° \\ 180° - 96° \\ \: \therefore \: {3}^{rd} \: angle = 84°$

$\boxed{\mathrm{ \mapsto Verification}}$

$48° + 48° + 84° = \boxed{180°}$

5 a) 180° - 30° + 45°

= 180° - 75°

= 105°

30° , 45° , 105° [One angle is more than 90°]

Hence, This ∆ is called obtuse - angled triangle.

b) Since a right angled triangle must have a 90°angle.

180° - 50° + 40°

= 180° - 90°

= 90°

Since the ∆ has a right angle.

Therefore, the triangle is right angled triangle.

c) 180° - 65° + 36°

= 180° - 101°

= 79°.

65° , 36° , 79° [All angles are different and less than 90°.]

Hence, this ∆ is called acute - angled triangle.