What is the name of the triangle in which two sides have the same length and the corresponding two angles have the same size? a. right c. scalene b. isosceles d. obtuse

The triangle is a polygon with three sides and three angles.
 A triangle in plane geometry is a polygon with three sides. The points common to each pair of sides are called vertices of the triangle
 isosceles triangle: Is isosceles if it has two sides of the same length. The angles that oppose these sides have the same measure.
 
 The name of the triangle in which two sides have the same length and the corresponding two angles have the same size is: 
 b. isosceles

B. isosceles triangle

Could you make it more clear?

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )