prove that in triangle adb and dbc angle A +angle b +anglec+angle d = 360
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WE KNOW THAT ANGLE SUM PROPERTY OF A TRIANGLE IS 180 DEGREES
SO TWO TRIANGLES 180+180=360
SO TWO TRIANGLES 180+180=360
Answered by
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we know that triangle*2=quadrilateral.
Here's a way.
Draw a quadrilateral ABCD. Make it a square. Draw a circle around it. You will se the quadrilateral will be fully travelled.
This means all four angles of a quad will add to 360*.
Therefore two triangles' angles will add to 360*.
Here's a way.
Draw a quadrilateral ABCD. Make it a square. Draw a circle around it. You will se the quadrilateral will be fully travelled.
This means all four angles of a quad will add to 360*.
Therefore two triangles' angles will add to 360*.
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