A triangle has an acute angle.

In a triangle, the complementary angles measure 90 degrees in total.

In a triangle, the sum of the supplementary angles is equal to 180 degrees.

We need to smooth things over for everything to go well.

Acute angles are less than 90 degrees.

Obtuse angles are larger than acute angles.

Wide-angle lenses capture a wider view of the scene.

Wide-angle lenses offer an incredible panoramic view.

This film was shot with a wide-angle lens to capture the beauty of the landscape.

I used a wide-angle lens to capture the panoramic view.