Помогите срочно,пж

треугольник ABC- прямоугольный с прямым углом C, отрезок CD- является его высотой. 1) Найдите острые углы треугольника ABC, ЕСЛИ a) угол ACD=42 градусам b) угол BCD= 37 градусам

Доброго времени суток. Очень хочу разобраться с данной задачей. Был бы очень благодарен , если бы помогли с решением и немного объяснили. Извините, если наглею. Задание на построение прямой, параллельной данной плоскости. Задача. Построить сечение многогранника плоскостью, проходящей через прямую PQ параллельно другой заданной прямой: а) МА; б) МВ; в) АС.

Playing Foam Hand Product Description Playing Foam Hand DescriptionModel No.: LS-H-35 Material: 25D base foam Sponge Colour: white Print Colour: blue surface and white logo for both sides. Size58*27CM Thickness2.5CM or by customer's option Trade TermsEXW; FOB; CNF; CIF Package1 pc/opp bag 100 pcs/carton vaccum packed Shipping DetailsAny Port, China by sea; by air; by railway; by express Payement TermsT/T; L/C; West Union; Paypal MOQ1000 PCS Lead TimeNo more than 7 days for MOQ. (After deposit comes to our account.) Varies according to your purchase quantity Sample StatusNo more than 3 days. The sample charge according to your design, and the freight cost would be in buyer's account. If you have any special demands, please feel free to contact us. Payment Terms - 30% deposit, 70% balanced against the copy of BL. - L/C - PAYPAL, WEST UNION Lead Time - No more than 7 days according to the MOQ. -Varies according to the real purchase quantity. Package - 1 pc/opp bag - 100 pcs/carton - vacuum packed Shipping - Any port, China - By Sea; By Air; By express -FCL; LCL Production Line Office&Meeting Room Company Information Laisi Sponge Co., Ltd. Located in Nantong city, Jiangsu Province, which land on the Yangtze River Economical Zone. Near the Shanghai Port. Ningtong Highway. So the transportation is very convenient. Laisi is a dedicated professional sponge manufactures in Southeast China. Our products are widely used in the areas of home furnishing, toy, industry, cosmetic, packing, medical, etc. We have the professional machine of sponge. So we can produce all kinds of sponge product by customer's sample. The products directly sells to more than 20 countries that cover United States, Europe, South-east Asia and so on. We are facing great challenges and also best opportunities to a wide world market. For further information and inquiries of our company or our products please feel free to contact us. Global Sales Network Certifications Contact Details NANTONG LAISI SPONGE PRODUCT CO., LTD Leo W.丨Marketing Director Add: Shuangdong Bridge, Shuangdian Town, Rudong County, Nantong City, Jiangsu China.(Postal Code:226401) Mobile Phone: 86 13656286743 Office Line: 86 513 84615969 Skype: jsleowang QQ: 915662291 Wechat/whatsapp: 13656286743 E-mail: [email protected] [email protected] foam quotation website:http://www.foamaker.com/foam-hand/

[email protected]

BC=15.

помогите срочно!! спасибо)))

Дано : угл 1 =125 градуссам
Найти : угл 2 , 3 ,4


Дано:АВ паралельные СD
Найти: угл АОЕ