Question

Eva uses a plank for support in Wildwoods. She observes triangles on the plank. Select the incorrect statement.

• A. Triangle D is a right triangle.
  
• B. Triangle C is an obtuse triangle.
• C. Triangle E is a right triangle.
  
• D. Triangles A and B are acute triangles.
  

Answer 1

The correct option is A Triangle D is a right triangle.


We will observe each statement one by one.


$\bullet$ Statement 1: Triangle E is a right triangle.
$\bullet$ Yes, triangle E has a right angle in it. It is a right triangle.

$\bullet$ Statement 2: Triangle C is an obtuse triangle.
$\bullet$ Yes, triangle C has an obtuse angle of ${125}^{\circ }$ in it. It is an obtuse triangle.

$\bullet$ Statement 3: Triangle A and B are acute triangles.
$\bullet$ Yes, triangle A and B have all acute angles in it. They are acute triangles.

$\bullet$ Statement 4: Triangle D is a right triangle.
$\bullet$ No, triangle D does not have a right angle in it. It is not a right triangle.

Hence, the statement in option D is incorrect.