Question

answer
scalene obtuse
isosceles right
equilateral
scalene acute
isosceles acute
scalene right
isosceles obtuse
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Explanation:

Step1: Check for equal sides

In triangle \(JKI\), \(JK = 5.09\) and \(KI=5.09\). So, two sides are equal. This means it is an isosceles triangle.

Step2: Check for angle types

The angles of the triangle are \(50^{\circ}\), \(50^{\circ}\), and \(80^{\circ}\). All angles are less than \(90^{\circ}\). So, it is an acute - angled triangle.

Answer:

Isosceles Acute