11th Class Math MCQS
The angle which is less than 90o is called
Obtuse angle
Complementary angle
Acute angle
Supplementary angle
At the top of a Cliff of 80m high: the angle of depression of a boat is 12°. How far s the boat from the Cliff?
376m
400m
200m
276m
In a ?ABC, Law of consine is:
1/2ab siny
a-b/a+b = tan(a – ?)/tan(a+?/2)
cosC = a2 +b2 -c2/2ab
a/sinA = B/sinB = c/ sinC
The greatest angle is opposite to:
Greatest side
Same side
Smallest side
Right side
The circle passing through the vertices of a triangle is:
e-circle
In-circle
Circum – circle
None of these
With usual notation, the value of a-b+c is:
S – b
S + b
2(S – b)
2S – b
If ? = 2347, a = 79 and c = 97 then ?
30°
45°12′
39°30′
36°10′
A circle passing through the vertices of a triangle is called:
Cirum-circle
In-circle
None of these
Escribed circle
At the top of a Cliff of 80m high the angle of depression of a boat is 12O How far is the boat from the Cliff?
200m
276m
376m
400m
The point of intersection of the right bisectors of the sides of a triangle is called:
Circum – centre
None of these
Ex-centre
In-centre
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