Question

brief introduction about Congruence of triangle
Rational numbers

Answer 1

Answer:

Definition 1.1. A positive rational number n is called a congruent number if there is a rational right triangle with area n: there are rational a, b, c > 0 such that a2 + b2 = c2 and (1/2)ab = n. In Figure 1 are rational right triangles with respective areas 5, 6, and 7, so these three numbers are congruent numbers

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Answer 2

Congruency :- Congruence of triangles. Two triangles are congruent if their corresponding sides are equal in length, and their corresponding angles are equal in measure.

Rational number :- the number in p/ q where q is not equal to 0 ....