standard 9th triangle chapter full details
Answers
Answer:
you can search in Google
Answer:
Congruent Triangles
In a pair of triangles if all three corresponding sides and three corresponding angles are exactly equal, then the triangles are said to be congruent.
Criteria for Congruency
The following are the criteria for the congruency of the triangles.
SSS Criteria for Congruency
If three sides of one triangle are equal to the three sides of another triangle, then the two triangles are congruent.
If all sides are exactly the same, then their corresponding angles must also be exactly the same.
SAS Criteria for Congruency
– Axiom: Two triangles are congruent if two sides and the included angle of one triangle are equal to the corresponding sides and the included angle of the other triangle.
ASA Criteria for Congruency
– Two triangles are congruent if two angles and the included side of one triangle are equal to the corresponding two angles and the included side of the other triangles
AAS Criteria for Congruency
– Two triangles are said to be congruent to each other if two angles and one side of one triangle are equal to two angles and one side of the other triangle.
RHS Criteria for Congruency
If in two right triangles the hypotenuse and one side of one triangle are equal to the hypotenuse and one side of the other triangle, then the two triangles are congruent.
RHS stands for Right angle – Hypotenuse – Side.
Properties of Isosceles triangle
– If 2 sides of the triangle are equal, the angles opposite those sides are also equal and vice versa.
Criteria for Congruency of triangles
– The criteria for congruency of triangles are :
SAS
ASA
AAS
SSS
RHS