Advertisements
Advertisements
प्रश्न
Calculate the unknown marked angles of the following figure :
Advertisements
उत्तर
We know that the sum of three angles of a triangle is 180°, therefore
In figure,
a + 90° + 40° = 180°
⇒ a + 130° = 180°
⇒ a = 180° − 130° = 50°
Hence a = 50°
APPEARS IN
संबंधित प्रश्न
Is the following statement true and false :
A triangle can have at most one obtuse angles.
In ΔRST (See figure), what is the value of x?
One angle of a triangle is 61° and the other two angles are in the ratio `1 1/2: 1 1/3`. Find these angles.
One of the base angles of an isosceles triangle is 52°. Find its angle of the vertex.
Find, giving a reason, the unknown marked angles, in a triangle drawn below:
As shown in the figure, Avinash is standing near his house. He can choose from two roads to go to school. Which way is shorter? Explain why.
The correct statement out of the following is 
S is any point on side QR of a ∆PQR. Show that: PQ + QR + RP > 2PS.
In the following figure, ∠BAC = 90° and AD ⊥ BC. The number of right triangles in the figure is ______.
Which two triangles have ∠B in common?
