Name the solid formed by the points A,B,C and D if |AB| = |BC| = |CD| = |AD| = |BD| = |AC|.

In two triangles, ABC and ADC, if AB=AD, BC=CD. Are they congruent?

P,Q,R and S are respectively the mid points of the sides AB,BC,CD and Da of a quadrilateral ABCD in which AC=BD and ACbotBD . Prove that PQRS is a square.

In the DeltaABC,AB=a,AC=c and BC=b , then

In the given fig. O is the point of each of the line segment AB and CD prove that AC=BD and AD||BD

In Fig if AD bot BC , prove that AB^2 + CD^2 = BD^2 + AC^2 .

If a point C lies between two points A and B such that AC = BC, then prove that AC=1/2AB . Explain by drawing the figure.

ABCD is a trapezium in which AB || DC . M and N are the mid-points of AD and BC respectively. If AB = 12 cm, and MN = 14 cm, find CD.

In Fig. if AC = BD, then prove that AB = CD.

In Fig. if AC = BD, then prove that AB = CD.

In the fig. AC>AB and D is the point on AC such that AB=AD. Show that BC>CD