1 If 3n + 7 = 25, then find the value of the expression 8n - 3 2 In ∆ DEF and ∆ XYZ, DE = XY, angle E = angle Y and EF = YZ. Name the
test of congruency by which both the triangles are congruent.
3 The equation for the statement ‘The sum of seven times m and
fourteen gives 77’ is _.
4 The base of a triangle is 18 cm and its area is 36 sq. cm. The height of
the triangle is _ cm.
5 If two triangles are congruent under the correspondence P ↔ Y , Q ↔
Z , R ↔ X , then it can be said that ∆ PQR ≅ _