Question

find the area of isoscles right angle triangle whose base is 30

Answer 1

$let \: the angles \: be \: x \\ x + x + 30 = 360 \\ 2x = 360 - 30 \\ 2x = 330 \\ x = 330 \div 2 \\ x = 165 \\ the \: two \: angles \: are \: 165 \: degree$

Area in attachment