| 单词 | obtuse-angled triangle |
| 例句 | Further, of trilateral figures, a right-angled triangle is that which has a right angle, an obtuse-angled triangle that which has an obtuse angle, and an acute-angled triangle that which has its three angles acute. The Teaching of Geometry 2011-10-12T02:00:52.133Z He saw that he had an obtuse-angled triangle, with Lucy occupying the controlling point. The Secret Toll 2011-09-12T02:00:26.853Z If these two are placed with shortest sides together, we have another form, the obtuse-angled triangle, and this gives us all the five forms of the seventh gift. Froebel's Gifts Aries contains three principal stars, forming a characteristic obtuse-angled triangle. A Field Book of the Stars Q. Can a right-angled triangle, or an obtuse-angled triangle, be an equilateral? The Infant System For Developing the Intellectual and Moral Powers of all Children, from One to Seven years of Age |
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