ÂNGULOS

Anita is a mathematics teacher and when she fixed her clothes rack to the wall, she noticed that it contained several angles. With the help of a protractor, she measured some of these angles and made the following record (see image). The values of x and y in the figure that Anita made are, respectively:

• 180° and 60°

• 160° and 60°

• 120° and 60°

• 60° and 120°

Érica is an eyebrow designer and attends to her clients on a stretcher similar to the figure below. One day, a client, a mathematics teacher, observed and highlighted some angles present on the stretcher in the position in which the designer was attending her. The angles 1, 2, and 3, highlighted in the image, can be classified, in this order, as:

• Acute, obtuse, and right.

• Acute, right, and obtuse.

• Flat, acute, and right.

• Right, obtuse, and acute.

The following traffic sign 'Oblique Junction to the right' serves to warn the vehicle driver about the presence of a junction to the right, further ahead on the road. Considering that the highlighted angles in the image are supplementary, the value of the smaller angle is:

• 26°.

• 52°.

• 78°.

• 130°.

The image represents the position of an athlete when stretching for lower limb training. The angle formed by the athlete's legs in this position measures approximately:

• 45°.

• 80°.

• 90°.

• 180°.

Os ângulos são classificados de acordo com suas medidas. De acordo essa medida, o ângulo AĈB da figura é

• AGUDO

• OBTUSO

• RASO

• RETO.

Sabe-se que x e y são ângulos complementares. O valor do ângulo x quando y vale 30º será

• 30º.

• 60º.

• 90º.

• 120º.

ângulos OPV (opostos pelo vértice) tem medidas iguais. Qual a medida do ângulo y na imagem?

• 100º.

• 90º.

• 80º.

• 60º.

Na figura abaixo, a medida do ângulo x, em graus, é

• 40º.

• 45º.

• 135º.

• 180º.

Observe a imagem. O ângulo representado pela letra x vale:

• 180º

• 120º

• 60º

• 40º

Ângulos suplementares são um par de ângulos que quando somados medem 180º. Dados um par de ângulos x e y sabendo que eles são suplementares e que um deles mede 92º, o valor do outro ângulo é

• 88º.

• 92º.

• 112º.

• 128º.