Level:
Project ID:
1003107205
Accepted:
1
Clonable:
0
Easy:
0
Sizes of angles in a triangle form three consecutive arithmetic sequence terms. The size of the largest angle is four times the smallest one. Find the size of the smallest angle of the triangle.
$24^{\circ}$
$30^{\circ}$
$60^{\circ}$
$20^{\circ}$
$35^{\circ}$