Fill in the blanks to make the statements true:In Fig.,(a) ∠AOD is a

1.	Fill in the blanks to make the statements true:In Fig.,(a) ∠AOD is a/an ______ angle(b) ∠COA is a/an ______ angle(c) ∠AOE is a/an ______ angle
Answer» From the figure, (a) ∠AOD is a/an right angle. Is anyone angle in the triangle is equal to 90^o then the triangle is called right triangle. ∠AOD = ∠AOB + ∠BOC + ∠COD = 30^o + 20^o + 40^o = 90^o (b) ∠COA is a/an acute angle An acute angle is an angle formed between 0^o to 90^o. ∠COA = ∠COB + ∠BOA = 20° + 30° = 50^o (c) ∠AOE is a/an obtuse angle An obtuse angle is an angle formed between 90^o to 180^o. ∠AOE = ∠EOD + ∠DOC + ∠COB + ∠BOA = 40° + 40° + 20° + 30° = 130°

Fill in the blanks to make the statements true:In Fig.,(a) ∠AOD is a/an angle(b) ∠COA is a/an angle(c) ∠AOE is a/an __ angle

Answer»

From the figure,

(a) ∠AOD is a/an right angle.

Is anyone angle in the triangle is equal to 90^o then the triangle is called right triangle.

∠AOD = ∠AOB + ∠BOC + ∠COD

= 30^o + 20^o + 40^o

= 90^o

(b) ∠COA is a/an acute angle

An acute angle is an angle formed between 0^o to 90^o.

∠COA = ∠COB + ∠BOA

= 20° + 30°

= 50^o

(c) ∠AOE is a/an obtuse angle

An obtuse angle is an angle formed between 90^o to 180^o.

∠AOE = ∠EOD + ∠DOC + ∠COB + ∠BOA

= 40° + 40° + 20° + 30°

= 130°