Question

what are conditions necessary for a triangle to be congruent. To show that the sum of angles in a quadrilateral is 360 degree.​

Answer 1

Step-by-step explanation:

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Answer 2

There are total four conditions necessary for a triangle to be congruent.

Step-by-step explanation:

Four conditions are:

1. SSS:  Side - Side - Side. In this, the sides of a triangle have to be shown equal to other sides of a triangle.
2. SAS: Side - Angle - Side. In this, the two side and one angle have to be shows equal to the that of other triangle.
3. ASA: Angle - Side - Angle. In this, the two angles and one side have to be shown equal to that of the other triangle.
4. RHS: In this, the hypotenuse and one side have to be shown equal to that of other triangle. Both triangles have same $90^{o}$.                      

Just draw a quadrilateral and measure the inside angles of that quadrilateral with a protractor. Now add that angles, the sum will always equal to the   $360^{o}$.