SSC CHSL GEOMETRY NOTES pdf free download

E is midpoint of side AB. Find the side of the triangle? Let us solve this problem with the help of co-ordinate geometry. We know that angle subtend by a chord on centre is twice of the angle subtend on perimeter. CD passes through the centre of the circle. Therefore, CD must be the diameter of the circle. If we connect AB to the centre of the circle, we will get an equilateral triangle All 3 sides will be 6 cm.

Now, let us join A and D and B and D. The incentre of this equilateral triangle will also be the centre of the larger circle. In solid geometry, the volume of a pyramid is one-third the volume of a prism with similar height. Tetrahedron is a special case of a pyramid. Let us first find out the volume of the prism and then divide it by 3.

All the 4 triangular faces in a tetrahedron are congruent. Therefore, the height of the triangle will be the slant height of the tetrahedron. Look at the figure. Save my name, email, and website in this browser for the next time I comment.

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