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CHAPTER ONE Introduction 13 67.3 PROBLEM 1.3 14 A 28-ft long ladder leaning against a wall makes an angle of 70 with the ground. Determine the vertical height to which the ladder will reach. 1.5 Two legs of a right triangle are 6 ft and 10 ft. Determine the length of the hypotenuse and the angle opposite the short side. 1.6 In the roof truss shown, determine the lengths of the top chords AB and BC and find the angles at A and C 12 -0 PROBLEMS O 15-0 Section 1.3 The Mathematics of Statics 1.1 In the right triangle shown, PROBLEM 1.6 (a) a 히0 ft, 7 ft, find c. (b)20 m,a16 m, find b. 1.7 A level scaffold is to be supported at the center of a 12 ft ladder as shown. Determine the required length x and the angle8 12 lalder Scarfold PROBLEM 1.1 1.2 In the right triangle ABC shown, c25 ft and angle (a) Determine side a (b) Determine side b (c) Determine height h. PROBLEM 1.7 1.8 A wanderer hikes due east for 2 mi, then southeast for 3 mi, then due noeth for 6 mi, then southwest for 6 mi. She then notices a storm gathering. How far is she from her starting point? Find the unknown sides and/or angles) (b) b 78 ft, 85 ft, A 72 1.9 Freehand sketch the following triangles and solve completely -7 ft, b .. 24 ft, c (c) his side is 55°. Another angle is 63. Sketch the shape of the lot and determine how much fencing is needed to enclose it. PROBLEM 1.2 25 ft 1.10 One side of a triangular lot is 100 ft and the angle opposite 1.3 Determine the length of side,a and the measure of the two acute angles.

please help solve these problems.

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