Advertisements
Advertisements
Question
Calculate the unknown marked angles of the following figure :
Advertisements
Solution
We know that the sum of three angles of a triangle is 180°, therefore
In figure,
y + 80° + 20° = 180°
⇒ y + 100° = 180°
⇒ y = 180° − 100° = 80°
Hence y = 80°
APPEARS IN
RELATED QUESTIONS
In the given figure, AB || DE. Find ∠ACD.
Is the following statement true and false :
A triangle can have at most one obtuse angles.
In Δ ABC, if u∠B = 60°, ∠C = 80° and the bisectors of angles ∠ABC and ∠ACB meet at a point O, then find the measure of ∠BOC.
State, if the triangle is possible with the following angles :
60°, 60°, and 50°
Can a triangle together have the following angles?
85°, 95° and 22°
One angle of a right-angled triangle is 70°. Find the other acute angle.
Find, giving a reason, the unknown marked angles, in a triangle drawn below:
The length of the sides of the triangle is given. Say what types of triangles they are 3.4 cm, 3.4 cm, 5 cm.
The exterior angle of a triangle is equal to the sum of two
Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than `2/3` of a right angle.
