Question

2. Three angles of a Trapezium are 100°, 70° and 75°. Find its fouth angle.​

Answer 1

Answer:

115

Step-by-step explanation:

Sum of all angle=360

Fourth angle=x

=100+70+75+x=360

= 245+x=360

=x=360-245

=115

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Answer 2

$\rm {\purple{\fbox{Sum of all sides of quadrilateral = 360⁰}}}$

Let the fourth angle be x

Hence,

$\textsf{100⁰ + 70⁰ + 75⁰ + x = 360⁰}$

$\textsf{245⁰ + x = 360⁰}$

$\textsf{x = 360⁰ - 245⁰ }$

$\sf \huge{\pink {\fcolorbox{blue}{azure}{x = 115⁰ }}}$