Answer:
7+28=35
Step-by-step explanation:
Answer:
126 cm^3
Step-by-step explanation:
Use volume formula (Bh=V): 21×6=126





So to find value of x , we have to apply Linear Pair.

<u>Equation formed:</u>



<u>Step by step expansion:</u>




















Answer with Step-by-step explanation:
We are given that
ABCE is a rectangle .Rectangle is that quadrilateral in which opposite sides are equal and each is equal to 90 degrees.
D is the midpoint of E.
We have to prove that 
Statement:1 ABCE is a rectangle.D is the mid point of CE
Reason: Given
Statement 2:
Reason:By definition of rectangle
Statement:3 AE=BC
Reason: By definition of rectangle
Statement 4:
Reason: By definition of midpoint because D is the midpoint of side EC
Statement 5:
Reason:SAS postulate
Statement: 6 
Reason:CPCT
Hence proved.