JAMB - Mathematics (1981 - No. 45)
In the figure, find x in terms of a, b and c.
a + b + c
180o - (a + b + c)
a - b - c
a + b
a + c
คำอธิบาย
180 - x + a + b + c
= 180(sum of interior angle in triangle)
a + b + c = x.
= 180(sum of interior angle in triangle)
a + b + c = x.