An isosceles triangle must be an acute triangle______ (judge right or wrong)

An isosceles triangle must be an acute triangle______ (judge right or wrong)

Not necessarily. For example, 120 degrees, 30 degrees, 30 degrees are isosceles triangles, but they are obtuse triangles at the same time; 90 degrees, 45 degrees, 45 degrees are isosceles triangles, and they are right triangles at the same time

Draw a triangle in the square as required. (1) draw a triangle, which is both isosceles triangle and acute angle triangle. (2) draw a triangle, which is both isosceles triangle and right angle triangle. (3) draw a triangle, which is both isosceles triangle and obtuse angle triangle

An isosceles triangle is not necessarily an acute triangle. Is that right

An isosceles triangle is not necessarily an acute triangle (√)
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