Question 144-) ABCD is trapezoidal, | DB | = 20 cm, if m (CBD) = 15 °; how many cm² is the area of the trapezoid?
Question 145-) O centered circle [BE and [BD; [AC] at point E and D; Tangent to point F, m (AOC) = 9x, m (DBE) = 6y, 2x + 3y = 23 °, how many degrees is x?
Question 146-) [ND]; Tangent to the circle centered B at point F, perpendicular to [NK] [BD], | NK | = | BC | = | CD | if; How many degrees is m (DBN)?
Question 147-) If [AE] is tangent to the circle at point C, | AB | = | BC |, m (CBA) = 30 °, m (AEB) = 50 °, m (BCD) = α; How many degrees is α?
Question 148-) If the center of the semicircle is | AE | = | ED | = | DC |, the size of the arc CB is 36 °, m (BAE) = x; How many degrees is x?
Question 149-) In the circle in the figure, if m (ACB) = 25 °, m (CBA) = 75 °, m (DBE) = α; How many degrees is α?
Question 150-) ABCD quadrilateral, perpendicular to [BA] [AD], perpendicular to [BC] [CD], if m (CBD) = 55 °, m (CED) = 103 °; How many degrees is m (ADB) = x?
Question 151-) If points A and C are tangent to the circle centered O, perpendicular to [AO] [OD], | AB | = 18 cm, | OA | = 6 cm; | ED | = How many degrees is x?
Question 152-) The C corner of the CDOE square in the figure is on the O-centered circle arc, and the D and E corners are on the [AP] beam. Accordingly, how many degrees is m (POA)?
Question 153-) If ABCD is a square, B centered quarter circle, [DC] diameter semicircle, A, E and F are linear, m (FED) = α; How many degrees is α?
Question 154-) O-centered circle arc; It passes through the points A, B, D. OAC is a right triangle, | OA | = 12 cm, | DC | = 4 cm, | BC | = x; How many cm is x?
Question 155-) If ABCD is a square, D centered quarter circle, [BC] diameter semicircle, | BC | = 2 root 10 cm; | AE | = how many cm is x?
Question 156-) If the centered semicircle is ABOD and OFEC is the contour | FP | = 4 cm, | EF | = 8 cm; What is cm2’s of the hatched area?