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The sum of the measurements of $\angle R$ and $\angle T$ is 90 degrees.

What types of angles are $\angle R$ and $\angle T$ ?

$\angle R$ and $\angle T$ are both acute.

$\angle R$ is acute but $\angle T$ is obtuse.

$\angle R$ is obtuse but $\angle T$ is acute.

$\angle R$ and $\angle T$ are both right angles since they measure 90 degrees.

One angle is a right angle and the other is acute.

We do not have enough information to determine what types of angles $\angle R$ and $\angle T$ are.