A straight angle is 180 degrees.

A round angle is 360 degrees.

The internal angle of this figure is 90 degrees.

Anyway, we have no choice but to accept his proposal.

If the angle of incidence is large, the reflection becomes stronger.

The calculation of the spherical angle is a part of geometry.

When light enters water, the angle of refraction changes.

The pheasant-tailed jacana, known as 'the ballerina of the water' for its beautiful appearance.

His research mainly focuses on the chelicerae of spiders.

The antennae of this insect are very long.