Tag: identifying angles

Measure of a right angle is $90^ \circ$

$Obtuse \ angle$ has measure more than that of $right \ angle \ but \ less \ than \ 180\ degree$

$Acute \ angle$ has measure less than $right \ angle$

Angles between $ {0}^{o} $ and $ {90}^{o} $ are acute angles. Hence, $ {89}^{o} $ is an acute angle.

For acute angles triangle all the three angles must be less than ${ 90 }^{ \circ  }$.

Angles which measure $ {0}^{o} $ and less than $ {90}^{o} $ are acute angles.

Angles between $ {90}^{o} $ and $ {180}^{o} $ are obtuse angles.

Hence, $ {179}^{o} $ is an obtuse angle.

An angle which measures $ {180}^{o} $ is called a straight angle.

An angle which measures $180^o$ is called a straight angle