Edge
Definition of Edge
Edges are the intersection of faces in a threedimensional figure.
Example of Edge

In the cube shown, the red line segment is the intersection of the faces A and B of the cube.
Video Examples:Edgeucation: Vedic Maths: Trick for Multiplication of 2Digit Nos
Solved Example on Edge
Ques: How many edges does a cube have?
Choices:
A. 14B. 12
C. 10
D. 6
Corrected Answer: B
Solution:

Step 1: A cube has two square bases and four square faces joining the two bases.
Step 2: So, the number of edges of a cube = number of edges of the two bases + number of edges joining the bases.
Step 3: = (2 � 4) + 4 = 8 + 4 = 12
Step 4: So, a cube has 12 congruent edges.
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