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यहाँ ‘गुरु’ बहुवचनार्थ में है , अतः ‘गुरुओं का’ होना चाहिए।
If O is the orthocentre of ΔABC , if ∠ BOC = 120 0 then what is the measure of ∠ BAC?
The length of the each side of an equilateral triangle is 10.5 cm. The area of incircle, (cm 2 ) is
The perimeter of a rectangular field is 240 meters, and its length is 20% more than its breadth. What is the area of the field?
Angles of a triangle are in the ratio 1 : 2 : 3. Find the measure of the largest angle.
- What is the inradius of a right-angled triangle if its base measures 20 cm and its height (perpendicular) is 21 cm?

What will be circumradius of an equilateral triangle of side 6 cm?
The perimeter of a rectangle is 100 m, and its diagonal is 41 m. Find the area of the rectangle.
The area of the largest triangle inscribed in a semi-circle of radius R is-
The area of an equilateral triangle is 4√3 sq m. Its perimeter is