Sovle `DeltaABC` if `mangleA=90^(@),a=7,b=5`.

Explanation

To solve triangle \( \Delta ABC \) given that \( \angle A = 90^\circ \), \( a = 7 \), and \( b = 5 \), we can follow these steps:

### Step 1: Identify the Triangle Configuration
Since \( \angle A = 90^\circ \), we have a right triangle where:
- \( A \) is the vertex at the right angle.
- Side \( a \) (opposite angle \( A \)) is the hypotenuse, which is 7.
- Side \( b \) (opposite angle \( B \)) is 5.

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