12.Identify the type of triangle

a) acute triangle

b) obtuse triangle

c) right-angled triangle

d) equilateral

e) isosceles, right-angled triangle

Step-by-step explanation:

If all the angles in the triangle are less than 90°, it is an acute triangleIf one angle in the triangle is a right angle, then it is a right-angled triangleIf at least one angle is above 90°, it is an obtuse triangleIf all the sides of the triangle are equal, it is an equilateral triangleIf two sides of the triangle are equal, it is an isosceles triangleIf no sides of the triangle are the same length, it is a scalene triangle

Hope this helps!

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c