`ab- mn + an - bm` = ?

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 trapezium ABCD, AB//DC. M is mid point of AD and N is mid-point of BC. If AB = 8 cm and DC = 11 cm , find MN.

In a parallelogram ABCD, it is being given that AB = 10 cm and the altitudes corresponding to the sides AB and AD are DL = 6 cm and BM = 8 cm, respectively. Find AD.

/_ABC=90^(@) and BM is a median AB=8cm and BC=6cm. Then,length BM is equal to

In Delta ABC AB = 9 cm, BC = 12 cm and AC = 15 cm. BM is an altitude on AC. Then, BM = ……………cm.

A semi-circle has been drawn on AB as a diameter and two chords AL and BM have been draw there in which intersect each other a P.Prove that AB^(2)=AL-AP+BM-BP

In the fig. BM=BN, M is the mid point of AB and N is the mid point of BC. Show that AB=BC

Which of the following ions has a magnetic moment of 5.93 BM ? (Atomic number of V= 23 , Cr= 24 , Mn = 25 , Fe = 26 )