Question

1. find the missing angle and classify the triangle 40° ?

Explanation:

Step1: Recall the sum of angles in a triangle

The sum of the interior angles of a triangle is \(180^{\circ}\).

Step2: Calculate the missing angle

Let the missing angle be \(x\). We know one angle is \(90^{\circ}\) (right - angle) and another is \(40^{\circ}\). Using the formula \(x + 40^{\circ}+90^{\circ}=180^{\circ}\), we can solve for \(x\).

$$
LATEXBLOCK0
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Step3: Classify the triangle

Since one of the angles is \(90^{\circ}\), the triangle is a right - triangle.

Answer:

The missing angle is \(50^{\circ}\) and the triangle is a right - triangle.