In the triangle ABC, AB=12 centimetres, AD =4 centimetres, DC=2 centimetres, BE=5 centimetres. DE is parallel to AB. The perimeter of triangle CDE is:
A child asked a flock of birds,
How many are you? A bird replied.
We and us again,
With half of us
And half of that
With one more,
Would make hundred
How many birds were there?
In the figure a regular pentagon and a squa are joined together. What is the measure the marked angle ?
In the figure ABCD is a quadrilateral. A circle is drawn passing through the points A, B and C. Then the position of the point D is :
ABC is an equilateral triangle with side 6 centimetres. The sides of the triangle are tangents to the circle. The radius of the circle is:
In the figure the radius of the circle is 1 centimetre. The vertices of the square are points on the circle. The area of the unshaded region is:
In the figure a circle is fixed exactly inside the square. Without looking at the figure, if we put a dot the probability of the dot being inside the circle is :
A square pyramid is cut, open and laid flat as in the figure below. What is the surface area of this pyramid ?