Question

solve fast plz plz plz​

Answer 1

Answer:

18. 1

19. 2 (250

Step-by-step explanation:

19. 100+55+c=180.

     155+c=180.

     C= 180-155

     = 25.

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Answer 2

Questions:

• A triangle in which all the three angles are acute is called ?
• Two angles of a triangle are 100° and 55° respectively. Then the third angle of a triangle is ?

Answers:

• ACUTE ANGLED TRIANGLE (Option A)
• 25° (Option B)

Step by step explanation:

18) A triangle in which all the three angles are acute is called :

• That triangle is called acute-angled triangle.
• Ex- 60° , 60° , 60°

19) Two angles of a triangle are 100° and 55° respectively. Then the third angle of a triangle is?

Given:

• First angle = 100°
• Second angle = 55°

To find:

• Third angle?

Steps to do:

Let the third angle be x

• We know that, Sum of angles of a triangle is 180°.

➥ 100 + 55 + x = 180

➥ 155 + x = 180

➥ x = 180 - 155

➥ x = $\bf 25\degree$

Hence, The third angle is 25°.