What is the missing step in this proof? A.
∠ABC ≅ ∠DBE
B.
∠BCA ≅ ∠BDE
C.
∠ACB ≅ ∠DEB
D.
∠BDE ≅ ∠ADE
E.
∠CAB ≅ ∠DAC

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

Name these type of angles shown check all that applies

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).